Il punto 4 non lo capisco proprio se premo latrackball non accade nulla
Ho comunque trovato questa guidaSteps
1-Create a Goldcard.
2-Copy the required sappimg.nbh/zip to the Goldcard.
3-Boot your phone while holding the VOLUME-DOWN key.
4-Press the ACTION KEY (=trackball) to start the update.
5-Wait until the update completes and press the ACTION KEY (=trackball) to reboot your phone.
(Upgrade to the rooted ROM of your choice).
https://www.androidiani.com/wiki/Roo...L_nuovo_metodo
sembra che non funzioni solo a me